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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

12 Issues per year


IMPACT FACTOR increased in 2013: 1.411
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SCImago Journal Rank (SJR): 0.649
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Towards an optimized flow-sheet for a SANEX demonstration process using centrifugal contactors

D. Magnusson1 / Birgit Christiansen2 / J.-P. Glatz3 / Rikard Malmbeck* / G. Modolo4 / Daniel Serrano-Purroy5 / C. Sorel6

1 European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe, Deutschland

2 European Commission, JRC, Institute for Transuranium Elements, Karlsruhe, Deutschland

3 European Commission JRC, Institute for Transuranium Elements, Karlsruhe, Deutschland

4 Forschungszentrum Jülich GmbH, Institute for Safety Research and Reactor Technolo, Jülich, Deutschland

5 European Commission JRC, Institute for Transuranium Elements, Karlsruhe, Deutschland

6 CEA Valrho, DRRV/SEMP, Bagnols-sur-Cèze, Frankreich

* Correspondence address: European Commission JRC, Institute for Transuranium Elements, Postfach 2340, 76125 Karlsruhe, Deutschland,

Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology. Volume 97, Issue 3, Pages 155–159, ISSN (Print) 0033-8230, DOI: 10.1524/ract.2009.1587, September 2009

Publication History

Published Online:
2009-09-25

Abstract

The design of an efficient process flow-sheet requires accurate extraction data for the experimental set-up used. Often this data is provided as equilibrium data. Due to the small hold-up volume compared to the flow rate in centrifugal contactors the time for extraction is often too short to reach equilibrium D-ratios. In this work single stage kinetics experiments have been carried out to investigate the D-ratio dependence of the flow rate and to compare this with equilibrium batch experiments for a SANEX system based on CyMe4-BTBP. The first centrifuge experiment was run with spiked solutions while in the second a genuine actinide/lanthanide fraction from a TODGA process was used. Three different flow rates were tested with each set-up. The results show that even with low flow rates, only around 9% of the equilibrium D-ratio (Am) was reached for the extraction in the spiked test and around 16% in the hot test (the difference is due to the size of the centrifuges). In the hot test the lanthanide scrubbing was inefficient whereas in the stripping both the actinides and the lanthanides showed good results. Based on these results improvements of the suggested flow-sheet is discussed.

Keywords: Extraction; Kinetics; Partitioning; Centrifugal contactor; Minor actinides

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